Rh血型系统将人类的血型分成____和____两种;分型依据是___、__。
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金属发生电化学腐蚀,阴极得到电子的氧化剂又叫
A. 还原剂
B. 去极剂
C. 助剂
D. 氧化剂
析氢腐蚀时,超电压与电极材料的种类有关,以下哪种金属材料的超电压在1~1.5V区间。
A. 铁
B. 汞
C. 铜
D. 镍
E. 铂
F. 钨
Many interviewers call for the ________ experience in working.
A. ancient
B. before
C. previous
D. premature
The ________ disease made him too weak to work.
A. debilitate
B. debilitates
C. debilitating
D. debilitated